PORTSMOUTH — New England’s largest water park is planning to build a new attraction for the upcoming 2012 summer season.

Officials from Water Country have approached the city on a proposal to create a new, 70-foot tall attraction that involves audio and visual entertainment, in addition to a giant “wall of water.”

Andy Nitschelm, general manager of the water park, said the attraction known as “Tantrum” is manufactured by ProSlide Technology of Ontario, Canada.

“It’s a two-person tube ride with a little bit of audio and video effects,” said Nitschelm. “You go inside the tube and there is music and then there will be a wall of water which becomes like a video screen. You go into the wall of water and it could look like anything, like fire or a shark’s mouth.”

Nitschelm said there will likely be many different images.

“Tantrum” is the name of the ProSlide's prototype. Nitschelm said Water Country has yet to decide on a name for their attraction.

Before the attraction can become a reality, the proposal must first clear the city’s Board of Adjustment.

Park officials are expected seek a variance from the BOA on Oct. 18 for the project, which involves the installation of the new attraction as well as a building for mechanical and electrical systems.

The variance is needed because the proposed use doesn’t adhere to the current zoning on the property.

Nitschelm said the process of building the new attraction involves first going through the city to secure all necessary approvals and then getting approval from the corporate entity known as Palace Entertainment.

If approved, the new ride would be built on an existing dirt parking lot on site. Nitschelm said it would be constructed in close proximity to the Dragon’s Den and Tahiti Treehouse.

Past attempts to build new rides at the park have not always come to fruition. Nitschelm said a similar effort in 2008 faltered for financial reasons.

The cost of the current proposal is expected to be $750,000, according to city records.